Nicholas m



(No Model.)

N. M. WILLET.

WRENCH.

No. 439,919. Patented Nov. 4, 1890.

lam/21 E131:

Nitl'lmlas Nx/viuet UNITED STATES PATENT OFFICE.

NICHOLAS M. WILLET, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO JOSEPH J. DEDERIGH, OF SAME PLACE.

WRENCH.

SPECIFICATION formingpart of Letters Patent No. 439,919, dated November 4, 1890.

Application iiled November 25, 1889. Serial No. 331,469. (No model.)

To all whom it may concern.-

Be it known that I, NICHOLAS M. WILLET, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Wrenches, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to new and useful improvements in Wrenches; and the invention consists in the peculiar construction of an attachment to an ordinary wrench and of a swinging frame carrying a wheel, whereby the wrench may be used to as good advantage upon circular bodies as upon square bodies, all as more fully hereinafter described.

In the drawings, which accompany this specification, Figure 1 is a side elevation of my improved wrench. Fig. 2 is a perspective view thereof, showing it as applied to a circular body; and Fig. 3 is a front elevation of the jaws.

A is the handle, having the usual stationary jaw B formed at the end, and O is the sliding jaw, operated by means of the screw D, having the thumb-wheel E, all of known construction and operation.

F is a swinging frame, pivoted to the sliding jaws by means of pivots or pins a. This frame consists of two side bars b,provided with a slot 0, in which is engaged the pin or. Be tween the free ends of this frame is journaled the roller 61, the face of which I preferably roughen or corrugate by spiral grooves, either single spiral grooves or spiral grooves intersecting each other, to enable it to obtain a proper grip upon the circular article. I find that this manner of corrugation enables me to grip the pipe in a better way than in any other form, and a corrugation of this type may be made upon the roller to better advantage than other forms of roughening.

e is a spring-catch secured to the sliding jaw in such relation that when the swinging frame is not desired to be used it can be held inthe position shown in Fig. l in full lines, so as not to interfere with the operation of the wrench for ordinary purposes.

The parts being constructed and arranged as described, they are intended to be operated as follows: The ordinary use of a wrench is well known, and it may be applied to any of the ordinary uses-when arranged as shown in Fig. 1. In order to apply it to circular bodies-such as a pi pethe swinging frame is disengaged from its spring-catch and the wheel (I is brought to bear upon the upper face of the sliding jaw. By turning the thumb-nut E to bring the clamping-jaws together, the wheel will be brought to bear against the side of the pipe and slightly thereunder. The operator then turning the handle toward the Wheel it will be clamped firmly between the pipe and the jaw, thereby holding the pipe firmly in the jaws, and enable him to turn it, as desired. The corrugation on the wheel prevents its slipping.

By means of the slot e,I am enabled to apply the wrench to pipe of any size for which a wrench is adapted. For a smaller pipe, as shown in Fig. 2, the wheel would be carried back to its farthest extent, and in a large pipe it would be near the end of the jaws, the operation in both cases being alike. The harder the operator turns upon the handle of the wrench the tighter the pipe will be clamped, as the turning will force the wheel more in under the pipe and against the jaw, thereby giving a firm hold. It will be seen that no strain whatever comes upon the small pivot a, as the thrust of the wheel is against the upper face of the jaw.

WVhat I claim is In a wrench,the combination, with the stationary and movable jaws, the latter having lateral pins on its outer end, of a frame consisting of two side bars having elongated slots in their ends through which the pins pass and a corrugated roll journaled in their opposite ends, and an outwardly-extending 9o catch-spring e, secured to the edge of the movable jaw in the path of-the roller, for retaining the same in an unused position, substantially as described.

In testimony whereof I affix my signature, 5 in presence of two witnesses, this 26th day of October, 1889.

NICHOLAS M. WILLE'I. 

